小生 原文 ArcGIS engine中气泡标注的添加、修改！
你微微地笑着，不同我说什么话。而我觉得，为了这个，我已等待得久了。
——泰戈尔
喜欢看你微微的笑着，哪怕你一句话都不说，看见你笑，仿佛四季如春……笑，蕴含着着一种信任，一种安全，一种爱护，一种宽容，一种心灵的感应……宝贝，朝我笑笑，好么？
生活本已是一杯苦酒，我们何不笑着饮下？一颗感恩的心，一颗热爱生活的心，爱惜那些值得爱的人，一起欢乐，一起将各自生活的苦酒淡化，每天都让我们灿烂的笑……
不要认为后面还有更好的，因为现在拥有的就是最好的。不要因为距离太远而放弃，爱情可以和你一起坐火车的。不要因为对方不富裕而放弃，只要不是无能的人，勤劳可以让你们富裕的。不要因为父母反对而放弃，你会发现因为这个原因而反放弃的爱情，将是你一生的悔恨。其实对于爱情，越单纯越幸福。一生只谈一次恋爱是最好的，经历的太多了，会麻木；分离多了，会习惯；换恋人多了，会比较；到最后，你不会再相信爱情；你会自暴自弃；你会行尸走肉；你会与你不爱的人结婚，就这样过一辈子。
ArcGIS engine中气泡标注 ，是我们在编辑图形中一个重要的工具，能提供注释功能，下面的介绍怎么来编程实现callout的添加，以及怎么去修改它们！
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// 在Mapcontrol的mouseDown中添加下列内容，来添加气泡注释功能：callout.
private
void
axMapControl1_OnMouseDown(
object
sender, IMapControlEvents2_OnMouseDownEvent e)
{
axMapControl1.CurrentTool =
null
;
IPoint pPoint ;
pPoint =
new
PointClass();
pPoint.PutCoords(e.mapX, e.mapY);
IFormattedTextSymbol pTextSymbol =
new
TextSymbolClass();
pTextSymbol.Background = CreateBalloonCallout(e.mapX, e.mapY)
as
ITextBackground;
pTextSymbol.Direction = esriTextDirection.esriTDAngle;
pTextSymbol.Angle = 15;
ITextElement pTextElement =
new
TextElementClass();
pTextElement.Symbol = pTextSymbol
as
ITextSymbol;
pTextElement.Text =
"MaDeSheng"
;
IElement ptexte = pTextElement
as
IElement;
pPoint =
new
PointClass();
pPoint.PutCoords(e.mapX * 0.90, e.mapY *1.1);
ptexte.Geometry = pPoint
as
IGeometry;
IMap pMap = axMapControl1.Map;
IGraphicsContainer pGraphicsContainer = pMap
as
IGraphicsContainer;
pGraphicsContainer.AddElement(pTextElement
as
IElement, 0);
this
.axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics,
null
,
null
);
}
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红颜色的部分是产生气泡背景，具体程序如下：
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public
IBalloonCallout CreateBalloonCallout(
double
x,
double
y)
{
IRgbColor pRgbClr =
new
RgbColorClass();
pRgbClr.Red = 225;
pRgbClr.Blue = 225;
pRgbClr.Green = 225;
ISimpleFillSymbol pSmplFill =
new
SimpleFillSymbolClass();
pSmplFill.Color = pRgbClr;
pSmplFill.Style = esriSimpleFillStyle.esriSFSSolid;
IBalloonCallout pBllnCallout =
new
BalloonCalloutClass();
//pBllnCallout.Style = esriBalloonCalloutStyle.esriBCSRectangle;
pBllnCallout.Style = esriBalloonCalloutStyle.esriBCSRoundedRectangle;
pBllnCallout.Symbol = pSmplFill;
pBllnCallout.LeaderTolerance = 5;
IPoint pPoint =
new
ESRI.ArcGIS.Geometry.PointClass();
pPoint.X = x;
pPoint.Y = y;
pBllnCallout.AnchorPoint = pPoint;
return
pBllnCallout;
}
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那么添加了之后如何修改呢?
双击事件！
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private
void
axMapControl1_OnDoubleClick(
object
sender, IMapControlEvents2_OnDoubleClickEvent e)
{
if
(e.button ==1)
{
//标注的修改
if
(((axMapControl1.CurrentTool)
as
ICommand).Name ==
"ControlToolsGraphicElement_SelectTool"
)
//这一句的判断很牛B，我当时考虑了半天才搞出来。难点呀！toolbarControl中要加载esriControls.ControlsSelectTool工具
{
IPoint pPoint =
new
PointClass();
pPoint.PutCoords(e.mapX, e.mapY);
IMap pMap = axMapControl1.Map;
IGraphicsContainer pGraphicsContainer = pMap
as
IGraphicsContainer;
IEnumElement pEnumElement = pGraphicsContainer.LocateElements(pPoint, 10);
if
(pEnumElement !=
null
)
{
IElement pElement = pEnumElement.Next();
if
(pElement
is
ITextElement)
{
ITextElement ptextElement = pElement
as
ITextElement;
labelEditCallout pLabelEditCallout =
new
labelEditCallout(ptextElement.Text, ptextElement.Symbol);
pLabelEditCallout.ShowDialog();
ptextElement.Text = pLabelEditCallout.inputText;
ptextElement.Symbol = pLabelEditCallout.textSymbol;
pGraphicsContainer.DeleteElement(pElement);
pGraphicsContainer.AddElement(pElement,0);
//这两句可以用pGraphicsContainer.UpdataElement(pElement);来代替
this
.axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics,
null
,
null
);
}
}
}
}
}
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labelEditCallout是我自己弄的一个修改样式，其实很简单的一个页面，截图如下：
具体，代码如下：
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using
System;
using
System.Collections.Generic;
using
System.ComponentModel;
using
System.Data;
using
System.Drawing;
using
System.Linq;
using
System.Text;
using
System.Windows.Forms;
using
ESRI.ArcGIS.Display;
using
ESRI.ArcGIS.Geometry;
namespace
Edit
{
public
partial
class
labelEditCallout : Form
{
public
string
inputText =
""
;
public
ITextSymbol textSymbol;
private
bool
ModifFillColor =
false
;
public
labelEditCallout(
string
s,ITextSymbol texSy)
{
inputText = s;
textSymbol = texSy;
InitializeComponent();
}
private
void
labelEditCallout_Load(
object
sender, EventArgs e)
{
textBox1.Text = inputText;
comboBox1.Items.Add(
"矩形框"
);
comboBox1.Items.Add(
"圆角矩形"
);
//comboBox1.Items.Add("Oval");
comboBox1.SelectedIndex = 1;
}
public
IColor ConvertColorToIColor(Color color)
{
IColor pColor =
new
RgbColorClass();
pColor.RGB = color.B * 65536 + color.G * 256 + color.R;
return
pColor;
}
private
void
button2_Click(
object
sender, EventArgs e)
{
IBalloonCallout textBack = (((IFormattedTextSymbol)textSymbol).Background)
as
IBalloonCallout;
IFillSymbol pOldFill = textBack.Symbol;
IPoint pPoint = textBack.AnchorPoint;
ISimpleFillSymbol pSmplFill =
new
SimpleFillSymbolClass();
pSmplFill.Style = esriSimpleFillStyle.esriSFSSolid;
if
(ModifFillColor)
{
pSmplFill.Color = ConvertColorToIColor(
this
.button1.BackColor);
}
else
pSmplFill.Color = pOldFill.Color;
IBalloonCallout pBllnCallout =
new
BalloonCalloutClass();
switch
(comboBox1.Text)
{
case
"矩形框"
:
pBllnCallout.Style = esriBalloonCalloutStyle.esriBCSRectangle;
break
;
case
"圆角矩形"
:
pBllnCallout.Style = esriBalloonCalloutStyle.esriBCSRoundedRectangle;
break
;
//case"Oval":
// pBllnCallout.Style = esriBalloonCalloutStyle.esriBCSOval;
// break;
}
pBllnCallout.Symbol = pSmplFill;
pBllnCallout.LeaderTolerance = 5;
pBllnCallout.AnchorPoint = pPoint;
IFormattedTextSymbol pTextSymbol =
new
TextSymbolClass();
pTextSymbol.Direction = esriTextDirection.esriTDAngle;
pTextSymbol.Angle = 15;
pTextSymbol.Background = pBllnCallout
as
ITextBackground;
textSymbol = pTextSymbol
as
ITextSymbol;
inputText = textBox1.Text;
this
.Close();
}
//获取颜色
private
void
button1_Click(
object
sender, EventArgs e)
{
if
(
this
.colorDialog.ShowDialog() == DialogResult.OK)
{
this
.button1.BackColor =
this
.colorDialog.Color;
ModifFillColor =
true
;
}
}
private
void
button3_Click(
object
sender, EventArgs e)
{
this
.Close();
}
}
}
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没有整理与归纳的知识，一文不值！高度概括与梳理的知识，才是自己真正的知识与技能。 永远不要让自己的自由、好奇、充满创造力的想法被现实的框架所束缚，让创造力自由成长吧！ 多花时间，关心他（她）人，正如别人所关心你的。理想的腾飞与实现，没有别人的支持与帮助，是万万不能的。
本文转自wenglabs博客园博客，原文链接：http://www.cnblogs.com/arxive/p/5903508.html，如需转载请自行联系原作者
